Unconformable overlap oil-gas reservoir physical simulation experimental device and experimental method

Abstract

The invention relates to an unconformable overlap oil-gas reservoir physical simulation experimental device and experimental method. The experimental device comprises a stratum box body, an unconformable cabin located below the stratum box body and a top plate located above the stratum box body; the stratum box body comprises a plurality of layers of independent simulation chambers; the length of an upper-layer simulation chamber is smaller than that of an upper-layer simulation chamber; each simulation chamber is not in contact connection with the unconformable cabin; holes are formed in side plates of each simulation chamber which contact with the unconformable cabin and the top plate of the unconformity cabin respectively; oil injection holes of a fluid injection system are formed in the bottoms of side plates of the simulation chambers, wherein the bottoms of the side plates of the simulation chambers are opposite to the side plates; a plurality of permeable baffles are arranged in the unconformable cabin; the unconformable cabin is divided into cabin units through the permeable baffles, wherein the number of the cabin units is equal to the number of the simulation chambers; and the simulation chambers are in one-to-one correspondence with the cabin units. With the experimental device and experimental method of the invention adopted, the simulation of an oil-gas migration and accumulation process in strata under unconformable surface overlap can be realized, and unconformable overlap oil-gas reservoir formation mechanisms and controlling factors are analyzed, and understanding of oil-gas accumulation factors and oil-gas distribution rules of the strata can be deepened, and a basis can be provided for oil-gas exploration in petroliferous basins.

Description

technical field [0001] The present invention relates to an experimental device and experimental method for oil and gas migration and accumulation, in particular, to a physical simulation device and experimental method for the formation mechanism of unconformity overlying oil and gas reservoirs. The sealing degree of the overlying strata can be traced to control the oil and gas migration and accumulation of the unconformity of the overlying strata. Background technique [0002] Differential ups and downs of the crust often cause the advancement and retreat of the water body, which is manifested as "overlapping" and "retreating" of the strata on the profile. When the water body progresses, the sedimentary range gradually expands, the newer sedimentary layer covers the older sedimentary layer, and expands towards the land, and the stratum overlay is formed when it contacts the older stratum erosion surface with unconformity. When the water body is progressive, the water basin ...

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Problems solved by technology

[0007] Most of the existing physical simulations of oil and gas migration and accumulation mechanisms are carried out in a large sandbox. Different geological models are constructed in the sandbox to simulate or verify the laws of oil and gas migration and accumulation in a certain area. Experimental device and experimental method designed for integration surface overlying oil and gas reservoirs

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